case-control-study-planner

case-control-study-planner is a skill for Claude Code, Codex from aipoch/medical-research-skills. It costs 35 tokens per session (2,639 once invoked), scanned A, original, MIT.

A planning guide for case-control studies, which compare people with a specified outcome to similar people without it and then examine earlier exposures. It covers the study population, control selection, matching, exposure measurement, and bias control.

In plain words
What is it for?
Planning studies of rare or long-latency outcomes and defining cases, controls, matching decisions, exposure data, and safeguards against bias.
Why use it?
It helps determine whether this design fits the question and reduces common errors in choosing controls or interpreting retrospective evidence.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Planning studies of rare or long-latency outcomes and defining cases, controls, matching decisions, exposure data, and safeguards against bias.

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Install with agentmods
npx agentmods add skills/aipoch/medical-research-skills/case-control-study-planner
About the project

Medical Research Agent Skills is a library of agent instructions for medical and biomedical research, covering evidence analysis, study protocol design, data analysis, and academic writing. Researchers use it to guide compatible coding agents through common scientific workflows. The catalogue contains many of the library's skills and commands.

aipoch/medical-research-skills · 1,860 stars · on GitHub · aipoch.com

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add aipoch/medical-research-skills --skill case-control-study-planner
Clone the repo
git clone --depth 1 https://github.com/aipoch/medical-research-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for case-control-study-planner

README.md
[![agentmods](https://agentmods.dev/badge/skills/aipoch/medical-research-skills/case-control-study-planner/github.svg)](https://agentmods.dev/skills/aipoch/medical-research-skills/case-control-study-planner)
Your own site
<a href="https://agentmods.dev/skills/aipoch/medical-research-skills/case-control-study-planner"><img src="https://agentmods.dev/badge/skills/aipoch/medical-research-skills/case-control-study-planner/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for case-control-study-planner

Your own site · 80×15
<a href="https://agentmods.dev/skills/aipoch/medical-research-skills/case-control-study-planner"><img src="https://agentmods.dev/badge/skills/aipoch/medical-research-skills/case-control-study-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,639 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00035 $0.02639
Opus 5 $0.00017 $0.01319
Sonnet 5 $0.00007 $0.00528
Haiku 4.5 $0.00003 $0.00264

Measured 9d ago against content hash 5a9b8f00d74a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

case-control-study-planner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

awesome-med-research-skills/Protocol Design/case-control-study-planner/SKILL.md · 297 lines

How it starts

The opening of the file, as written. The whole thing — 297 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Source: https://github.com/aipoch/medical-research-skills

Case-Control Study Planner

You are an expert clinical epidemiology and medical research design specialist. Your task is to build a case-control study design framework for a user’s research question.

This skill is for study type design and protocol framing, not for full manuscript writing, not for statistical code generation, and not for causal overclaiming. It should help the user define whether a case-control design is appropriate, how cases and controls should be sourced, how exposure should be measured, how matching should be used or avoided, and which bias-control points must be made explicit before downstream protocol writing.

This skill is especially useful when the user wants to study rare outcomes, long-latency outcomes, or exposures that are impractical to study through prospective follow-up, but it must not treat every retrospective clinical question as automatically suitable for a case-control design.

Core Task

Given a clinical research question, construct a structured case-control study blueprint that clarifies:

  1. Whether a case-control design is appropriate.
  2. What the implied source population is.
  3. How cases should be defined and identified.
  4. How controls should be defined and sampled.
  5. Whether matching is justified, and at what level.
  6. How exposure measurement should be performed.
  7. What the main selection, recall, information, and confounding risks are.
  8. What the primary analytic line should look like.
  9. What assumptions remain unverified.
  10. What design choices would make the study uninterpretable.

What This Skill Is For

Use this skill when the user needs help designing or structuring a case-control study in medicine, translational medicine, population health, hospital epidemiology, outcomes research, biomarker epidemiology, or pharmacoepidemiology.

Typical uses include:

  • Framing a retrospective case-control design around a clinical outcome.
  • Deciding between unmatched and matched control strategies.
  • Designing exposure ascertainment logic.
  • Identifying major bias risks before protocol drafting.
  • Converting a vague clinical association idea into a study-type-appropriate design scaffold.

Read the full file on GitHub · 297 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 297 lines · 35 tokens per session scan A 5a9b8f00d74a

Subscribe to this mod's changes

case-control-study-planner is a skill published in the GitHub repository aipoch/medical-research-skills (1,860 stars, last pushed 1mo ago), licensed MIT. It adds 35 tokens to every session and 2,639 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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